1. Department of Cardiology, Cardiocentro Ticino Institute, Ente Ospedaliero Cantonale, 6900 Lugano, Switzerland
2. Department of Internal Medicine, Ente Ospedaliero Cantonale, 6850 Mendrisio, Switzerland
3. Department of Cardiology, Regional Hospital Neustadt, 2700 Wiener Neustadt, Austria
4. Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria
5. Faculty of Biomedical Sciences, Università della Svizzera Italiana (USI), 6900 Lugano, Switzerland
6. Clinic of Nuclear Medicine, Imaging Institute of Southern Switzerland, Ente Ospedaliero Cantonale, 6500 Bellinzona, Switzerland
7. Faculty of Biology and Medicine, University of Lausanne (UNIL), 1015 Lausanne, Switzerland
8. Division of Cardiology, Azienda Sanitaria Locale Torino 4, 10073 Ospedale di Ciriè, Italy